Device and method for assembling push-pull turnover type locking device of container for railway

Abstract

The invention provides an assembling device and method for a container push-pull turnover type locking device for a railway, and belongs to the technical field of railway vehicle assembling devices.The assembling device comprises a frame body, a frame body positioning assembly, a plurality of lock seat positioning parts, a pair of adjusting rods, four jacking assemblies and a plurality of lock head positioning pointers; the frame body positioning assembly is connected to the frame body and used for positioning the frame body, the lock seat positioning component is connected to the frame body and used for positioning the lock seat, the pair of adjusting rods is movably connected to the pair of cross beams, the two ends of each adjusting rod can synchronously and axially move, and the four jacking assemblies are connected to the two ends of each adjusting rod respectively and used for making contact with the side wall of a flatcar underframe. The lock head positioning pointers are fixedly connected to the adjusting rod and used for positioning the lock heads. When the assembling device is used for assembling, manual lineation is not needed, manual lineation errors are avoided, the assembling precision is improved, the assembling time is shortened, and the working intensity of operation is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of railway vehicle assembly devices, and more specifically, relates to an assembly device and method for a railway container push-pull flip-type locking device. Background Art

[0002] Containers occupy the railway freight market with their large capacity and flexible transportation. The locking device is used to connect and fix the container to the railway flat car, so that the container can play a loading role in railway freight. The assembly quality of the locking device is directly related to whether the container can fall on the flat car and the performance of the whole vehicle. The railway flat car locking device includes multiple push-pull flip locking devices and multiple fixed locking devices, each of which consists of a lock seat and a lock head.

[0003] The fixed locking device is positioned with the push-pull flip locking device as the reference. The positioning reference is intuitive and clear, and manual marking can meet the requirements. Affected by the welding and locking device structure, the push-pull flip locking device currently adopts manual marking and assembly of the lock seat and the lock head in separate workstations. When marking, the push-pull flip locking device cannot be positioned with the lock head due to the structure. The lock seat can only be positioned and assembled first, and then the lock head. Affected by the sinking structure of the flat car chassis, it is difficult to mark the lock seat, and it is easy to have a large marking error. In order to overcome the marking error, it is necessary to adjust the position of the lock seat so that the height difference between the horizontal, longitudinal, diagonal and working surfaces of multiple lock seats must meet the process requirements. The adjustment time is long, and the assembly accuracy and assembly efficiency are low. After the lock seat is assembled, the lock head is positioned by the lock seat assembly position and the casting tolerance is large, resulting in the failure of the container to fall in the subsequent process. The lock seat must be burned and reassembled and adjusted. It often happens, causing serious repairs and direct economic losses.

[0004] In the process of solving these problems, technical improvements face many obstacles, including inaccurate positioning, cost, lack of process standardization, and challenges in device maintenance. These factors work together to make it difficult to change the assembly method. The long-term use of manual marking has caused frequent assembly errors, which has brought great uncertainty to the completion of the container in the later process. Therefore, it is urgent to explore more efficient and accurate assembly technology to improve overall operating efficiency, reduce unnecessary economic losses, and ensure the safety and reliability of products. Summary of the invention

[0005] The purpose of the present invention is to provide a device and method for assembling a push-pull and flip-type locking device for a railway container, so as to solve the problems of low assembly precision and low operation efficiency of the push-pull and flip-type locking device in the prior art.

[0006] In order to achieve the above-mentioned object, in a first aspect, the present invention provides an assembly device for a railway container push-pull flip-type locking device, comprising:

[0007] A frame body, which is rectangular and includes a pair of horizontal beams and a pair of longitudinal beams;

[0008] A frame positioning assembly, the frame positioning assembly is connected to the frame, and the frame positioning assembly is used to cooperate with the transverse center line and the longitudinal center line of the upper surface of the flat car chassis to position the frame;

[0009] A plurality of lock seat positioning components, each of which is connected to the frame, and is used to cooperate with the shape of the lock seat of the locking device to position the lock seat;

[0010] A pair of adjustment rods, wherein the pair of adjustment rods are movably connected to the pair of cross beams, the adjustment rods and the cross beams are arranged in the same direction, the adjustment rods include a first rod, a second rod and an intermediate connecting sleeve, the first rod and the second rod are respectively threadedly connected to two sides of the intermediate connecting sleeve, and the thread direction of the first rod is opposite to the thread direction of the second rod;

[0011] Four jacking assemblies, the four jacking assemblies are respectively connected to the ends of the two first rods and the ends of the two second rods, and the jacking assemblies are used to contact the side walls of the flat car bottom frame;

[0012] A plurality of lock head positioning pointers are fixedly connected to the adjusting rod, and the lock head positioning pointers are used to cooperate with the positioning marks of the lock head of the locking device to position the lock head.

[0013] Optionally, the frame positioning component includes:

[0014] A pair of transverse pointers, the pair of transverse pointers are respectively fixedly connected to the pair of transverse beams, and the pair of transverse pointers are used to cooperate with the transverse center line;

[0015] A pair of longitudinal pointers are respectively fixedly connected to the pair of longitudinal beams, and the pair of longitudinal pointers are used to cooperate with the longitudinal center line.

[0016] Optionally, the transverse pointer and the longitudinal pointer can both be adjusted in height via a threaded connection structure.

[0017] Optionally, the first rod is movably connected to one end of the crossbeam through a first set of ears;

[0018] The second rod is movably connected to the other end of the crossbeam through a second set of ears;

[0019] The middle connecting sleeve is rotatably connected to the middle part of the cross beam through a third set of ears.

[0020] Optionally, the assembling device further comprises:

[0021] A pair of lock positioning mounting seats, two ends of the pair of lock positioning mounting seats are respectively fixedly connected to a pair of adjusting rods, and a plurality of lock positioning pointers are arranged on the pair of lock positioning mounting seats.

[0022] Optionally, the lock head positioning pointer is threadedly connected to the lock head positioning mounting seat;

[0023] The upper end of the lock positioning pointer is fixedly connected to a hand wheel;

[0024] The lock head positioning pointer is provided with a first scale line.

[0025] Optionally, the lock seat positioning component is a groove-shaped component that matches the shape of the lock seat.

[0026] Optionally, the tightening assembly includes:

[0027] A top-tightening mounting seat, the upper portion of which is fixedly connected to the end of the first rod, or the upper portion of which is fixedly connected to the end of the second rod;

[0028] A tightening bolt is threadedly connected to the lower portion of the tightening mounting seat, and the tightening bolt is provided with a second scale line.

[0029] Optionally, a locking plate is fixedly provided at the middle and upper part of the tightening mounting seat, and the first set of ears and the second set of ears are both provided with rectangular holes matching the outer peripheral shape of the locking plate, and the locking plate is movably inserted into the rectangular holes.

[0030] In a second aspect, the present invention provides a method for assembling a push-pull flip-type locking device for a railway container, using the assembly device described in the first aspect, characterized in that it comprises:

[0031] Placing the assembly device on the flat car chassis;

[0032] Adjusting the position of the frame until the frame positioning assembly matches the positions of the transverse centerline and the longitudinal centerline;

[0033] Synchronously rotating the middle connecting sleeves of a pair of adjusting rods until the four tightening assemblies clamp the side walls of the flat car underframe;

[0034] Placing a plurality of locks with reference to the positions of a plurality of lock positioning pointers, and placing a plurality of lock seats with reference to the positions of a plurality of lock seat positioning components;

[0035] The plurality of lock heads and the plurality of lock seats are assembled and fixed on the flat car bottom frame.

[0036] The beneficial effects of the present invention are: providing an assembly device for a railway container push-pull flip-type locking device, comprising: a frame, a frame positioning assembly, a plurality of lock seat positioning components, a pair of adjustment rods, four top tightening assemblies and a plurality of lock head positioning pointers, wherein the frame positioning assembly is connected to the frame and used to position the frame, the lock seat positioning component is connected to the frame and used to position the lock seat, a pair of adjustment rods are movably connected to a pair of cross beams, the two ends of the adjustment rods can move axially synchronously, the four top tightening assemblies are respectively connected to the two ends of the adjustment rods and used to contact the side walls of the flat car chassis, and the plurality of lock head positioning pointers are fixedly connected to the adjustment rods and used to position the lock heads. The assembly device is used for assembly without manual marking, avoiding manual marking errors, improving assembly accuracy, reducing assembly time, and reducing operating work intensity.

[0037] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The above and other objects, features and advantages of the present invention will become more apparent through a more detailed description of exemplary embodiments of the present invention in conjunction with the accompanying drawings, wherein like reference numerals generally represent like components throughout the exemplary embodiments of the present invention.

[0039] Figure 1 One of the schematic structural diagrams of an assembly device of a push-pull and flip-type locking device for a railway container according to an embodiment of the present invention is shown.

[0040] Figure 2 The second schematic structural diagram of the assembly device of the push-pull and flip-type locking device for railway containers according to one embodiment of the present invention is shown.

[0041] Figure 3 A third schematic structural diagram of an assembly device for a push-pull and flip-type locking device for a railway container according to an embodiment of the present invention is shown.

[0042] Figure 4 A schematic structural diagram showing a railway container push-pull flip-type locking device assembly device connected to a flat car underframe according to an embodiment of the present invention.

[0043] Figure 5 Shows Figure 1 The local schematic structure of region A in the middle.

[0044] Figure 6 Shows Figure 1 The local schematic structure of region B in the middle.

[0045] Figure 7 A flow chart showing a method for assembling a push-pull and flip-type locking device for a railway container according to an embodiment of the present invention is shown.

[0046] Description of reference numerals:

[0047] 1. frame; 11. cross beam; 12. longitudinal beam;

[0048] 2. Frame positioning assembly; 21. Horizontal pointer; 22. Vertical pointer 22;

[0049] 3. Lock seat positioning components;

[0050] 4. Adjustment rod; 41. First rod; 42. Second rod; 43. Intermediate connecting sleeve; 44. First set of ears; 45. Second set of ears; 46. Third set of ears; 47. Rectangular hole;

[0051] 5. Jacking assembly; 51. Jacking mounting seat; 52. Jacking bolt; 53. Locking plate;

[0052] 6. Lock positioning pointer; 61. Hand wheel;

[0053] 7. Lock seat positioning installation seat;

[0054] 8. Lock positioning mounting seat;

[0055] 9. Flat car chassis. DETAILED DESCRIPTION

[0056] The preferred embodiments of the present invention will be described in more detail below. Although the preferred embodiments of the present invention are described below, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0057] like Figure 1-6 As shown, this embodiment provides an assembly device for a push-pull flip-type locking device for a railway container, comprising:

[0058] The frame 1 is rectangular and includes a pair of cross beams 11 and a pair of longitudinal beams 12;

[0059] A frame positioning assembly 2, the frame positioning assembly 2 is connected to the frame 1, and the frame positioning assembly 2 is used to cooperate with the transverse center line and the longitudinal center line of the upper surface of the flat car bottom frame 9 to position the frame 1;

[0060] A plurality of lock seat positioning components 3, wherein the plurality of lock seat positioning components 3 are all connected to the frame 1, and the lock seat positioning components 3 are used to cooperate with the shape of the lock seat of the locking device to position the lock seat;

[0061] A pair of adjusting rods 4, the pair of adjusting rods 4 are movably connected to a pair of cross beams 11, the adjusting rods 4 and the cross beams 11 are arranged in the same direction, the adjusting rods 4 include a first rod 41, a second rod 42 and an intermediate connecting sleeve 43, the first rod 41 and the second rod 42 are respectively threadedly connected to the two sides of the intermediate connecting sleeve 43, and the thread direction of the first rod 41 is opposite to the thread direction of the second rod 42;

[0062] Four jacking assemblies 5, the four jacking assemblies 5 are respectively connected to the ends of the two first rods 41 and the ends of the two second rods 42, and the jacking assemblies 5 are used to contact the side wall of the flat car bottom frame 9;

[0063] A plurality of lock head positioning pointers 6 are fixedly connected to the adjustment rod 4 , and the lock head positioning pointers 6 are used to cooperate with the positioning marks of the lock head of the locking device to position the lock head.

[0064] The method of using the assembly device is as follows:

[0065] The first step is to place the assembly device on the flat car chassis 9;

[0066] Step 2: Adjust the position of the frame 1 until the frame positioning component 2 matches the position of the horizontal center line and the vertical center line;

[0067] Step 3: synchronously rotate the middle connecting sleeves 43 of the pair of adjusting rods 4 until the four tightening components 5 clamp the side walls of the flat car bottom frame 9;

[0068] Step 4: Place multiple locks according to the positions of multiple lock positioning pointers 6, and place multiple lock seats according to the positions of multiple lock seat positioning components 3;

[0069] Step 5: assemble and fix multiple lock heads and multiple lock seats on the flat car chassis 9.

[0070] Specifically, the frame positioning assembly 2 cooperates with the transverse center line and the longitudinal center line of the upper surface of the flat car frame 9 to achieve the longitudinal and transverse positioning of the frame 1, and then positions and fixes the multiple lock seat positioning components 3 connected to the frame 1. Since the adjustment rod 4 and the crossbeam 11 are arranged in the same direction, the adjustment rod 4 cannot move in the longitudinal direction, so the lock positioning pointer 6 connected to the adjustment rod 4 is positioned in the longitudinal direction; the thread direction of the first rod 41 is opposite to the thread direction of the second rod 42. When the intermediate connecting sleeve 43 is rotated, the first rod 41 and the second rod 42 can be moved inward synchronously, so that the four tightening assemblies 5 clamp the side wall of the flat car frame 9, and the positioning pointer is positioned in the transverse direction by relying on the side wall of the flat car frame 9. The assembly device is used for assembly without manual marking, avoiding manual marking errors, improving assembly accuracy, reducing assembly time, and reducing operating work intensity.

[0071] Optionally, the frame positioning component 2 includes:

[0072] A pair of transverse pointers 21, the pair of transverse pointers 21 are respectively fixedly connected to the pair of crossbeams 11, and the pair of transverse pointers 21 are used to cooperate with the transverse center line;

[0073] A pair of longitudinal pointers 22 are respectively fixedly connected to the pair of longitudinal beams 12, and the pair of longitudinal pointers 22 are used to cooperate with the longitudinal center line.

[0074] In specific implementation, the position of the frame 1 is adjusted so that a pair of transverse pointers 21 are aligned with the transverse center line and a pair of longitudinal pointers 22 are aligned with the longitudinal center, thereby completing the positioning of the frame 1 .

[0075] Optionally, both the transverse pointer 21 and the longitudinal pointer 22 can be adjusted in height via a threaded connection structure.

[0076] Specifically, the heights of the transverse pointer 21 and the longitudinal pointer 22 are adjustable for easy positioning.

[0077] Optionally, the first rod 41 is movably connected to one end of the crossbeam 11 through a first set of ears 44;

[0078] The second rod 42 is movably connected to the other end of the beam 11 through a second set of ears 45;

[0079] The middle connecting sleeve 43 is rotatably connected to the middle part of the cross beam 11 through the third sleeve ear 46 .

[0080] Specifically, a movable connection mode between the adjustment rod 4 and the crossbeam 11 is provided, the first rod 41 can slide in the first set of ears 44, the second rod 42 can slide in the second set of ears 45, the middle connecting sleeve 43 can rotate in the third set of ears 46, and the first rod 41 and the second rod 42 can be driven to slide synchronously when the middle connecting sleeve 43 is rotated. Optionally, the assembly device also includes:

[0081] A pair of lock positioning mounting seats 8 , both ends of which are respectively fixedly connected to a pair of adjustment rods 4 , and a plurality of lock positioning pointers 6 are arranged on the pair of lock positioning mounting seats 8 .

[0082] In this embodiment, each lock positioning mounting seat 8 is provided with two lock positioning pointers 6 .

[0083] Specifically, the lock positioning pointer 6 is connected to the adjustment rod 4 through the lock positioning mounting seat 8, and the adjustment rod 4 can drive the lock positioning pointer 6 to adjust its position when it moves.

[0084] Optionally, the lock positioning pointer 6 is threadedly connected to the lock positioning mounting seat 8; the lock positioning pointer 6 can be adjusted in height by rotating to facilitate positioning.

[0085] A hand wheel 61 is fixedly connected to the upper end of the lock positioning pointer 6; the hand wheel 61 is provided to facilitate the rotation operation.

[0086] The lock head positioning pointer 6 is provided with a first scale line, and the first scale line facilitates intuitive observation of the installation height of the lock head to avoid height error.

[0087] Optionally, the lock seat positioning component 3 is a groove-shaped component that matches the shape of the lock seat.

[0088] In this embodiment, the assembly device also includes a pair of lock seat positioning mounting seats 7, the two ends of the lock seat positioning mounting seats 7 are respectively fixedly connected to a pair of cross beams 11, the lock seat positioning components 3 are fixedly installed on the lock seat positioning mounting seats 7, and each lock seat positioning mounting seat 7 is provided with two lock seat positioning components 3.

[0089] Optionally, the tightening assembly 5 includes:

[0090] A top-tightening mounting seat 51, wherein the upper portion of the top-tightening mounting seat 51 is fixedly connected to the end portion of the first rod 41, or the upper portion of the top-tightening mounting seat 51 is fixedly connected to the end portion of the second rod 42;

[0091] A tightening bolt 52 is threadedly connected to the lower portion of the tightening mounting seat 51 , and a second scale line is provided on the tightening bolt 52 .

[0092] Specifically, the tightening bolts 52 are used to further apply clamping force to firmly connect the assembly device to the flat car frame 9, and the second scale line is used to observe the extended length of the tightening bolts 52 to facilitate the synchronous action of the four tightening bolts 52 and reduce positioning errors.

[0093] Optionally, a locking plate 53 is fixedly disposed in the middle and upper part of the tightening mounting seat 51 , and the first set of ears 44 and the second set of ears 45 are both provided with a rectangular hole 47 matching the outer peripheral shape of the locking plate 53 , and the locking plate 53 is movably inserted in the rectangular hole 47 .

[0094] Specifically, the lock plate 53 cooperates with the rectangular hole 47 to prevent the pressing mounting seat 51 and the adjusting rod 4 from rotating. When the intermediate connecting sleeve 43 is rotated, the adjusting rod 4 only slides but does not rotate.

[0095] like Figure 7 As shown, this embodiment also provides a method for assembling a push-pull flip-type locking device for a railway container, using the assembly device in the first embodiment, comprising:

[0096] S1, placing the assembly device on the flat car chassis 9;

[0097] S2, adjusting the position of the frame 1 until the frame positioning component 2 matches the position of the horizontal center line and the longitudinal center line;

[0098] S3, synchronously rotating the middle connecting sleeves 43 of a pair of adjusting rods 4 until the four tightening components 5 clamp the side walls of the flat car underframe 9;

[0099] S4, placing multiple locks with reference to the positions of multiple lock positioning pointers 6, and placing multiple lock seats with reference to the positions of multiple lock seat positioning components 3;

[0100] S5, assembling and fixing a plurality of lock heads and a plurality of lock seats on the flat car chassis 9.

[0101] In this embodiment, welding is used to fix the plurality of lock heads and the plurality of lock seats.

[0102] Specifically, the method is used to assemble the push-pull flip locking device, which does not require manual marking, avoids manual marking errors, improves assembly accuracy, reduces assembly time, and reduces operating workload.

[0103] The embodiments of the present invention have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A railway container push-pull flip locking device assembly device, characterized in that: include: A frame (1), the frame (1) is rectangular and comprises a pair of cross beams (11) and a pair of longitudinal beams (12); A frame positioning assembly (2), the frame positioning assembly (2) being connected to the frame (1), the frame positioning assembly (2) being used to cooperate with the transverse center line and the longitudinal center line of the upper surface of the flat car underframe (9) to position the frame (1); A plurality of lock seat positioning components (3), each of which is connected to the frame (1), and the lock seat positioning components (3) are used to cooperate with the outer shape of the lock seat of the locking device to position the lock seat; A pair of adjusting rods (4), wherein the pair of adjusting rods (4) are movably connected to the pair of cross beams (11), the adjusting rods (4) and the cross beams (11) are arranged in the same direction, the adjusting rods (4) comprise a first rod (41), a second rod (42) and an intermediate connecting sleeve (43), the first rod (41) and the second rod (42) are respectively threadedly connected to two sides of the intermediate connecting sleeve (43), and the thread direction of the first rod (41) is opposite to the thread direction of the second rod (42); Four tightening assemblies (5), the four tightening assemblies (5) being respectively connected to the ends of two first rods (41) and the ends of two second rods (42), the tightening assemblies (5) being used to contact the side wall of the flat car underframe (9); A plurality of lock head positioning pointers (6) are fixedly connected to the adjustment rod (4), and the lock head positioning pointers (6) are used to cooperate with the positioning marks of the lock head of the locking device to position the lock head.

2. The assembly device for the push-pull and flip-over locking device for railway containers according to claim 1, characterized in that: The frame positioning component (2) comprises: A pair of transverse pointers (21), the pair of transverse pointers (21) are respectively fixedly connected to the pair of crossbeams (11), and the pair of transverse pointers (21) are used to cooperate with the transverse center line; A pair of longitudinal pointers (22), the pair of longitudinal pointers (22) are respectively fixedly connected to the pair of longitudinal beams (12), and the pair of longitudinal pointers (22) are used to cooperate with the longitudinal center line.

3. The assembly device for the push-pull and flip-over locking device for railway containers according to claim 2, characterized in that: The transverse pointer (21) and the longitudinal pointer (22) can both be adjusted in height via a threaded connection structure.

4. The assembly device for the push-pull and flip-over locking device for railway containers according to claim 1, characterized in that: The first rod (41) is movably connected to one end of the crossbeam (11) via a first ear (44); The second rod (42) is movably connected to the other end of the crossbeam (11) through a second set of ears (45); The middle connecting sleeve (43) is rotatably connected to the middle part of the crossbeam (11) via a third sleeve ear (46).

5. The assembly device for the push-pull and flip-type locking device for railway containers according to claim 1, characterized in that: Also includes: A pair of lock positioning mounting seats (8), both ends of the pair of lock positioning mounting seats (8) are respectively fixedly connected to a pair of adjusting rods (4), and a plurality of lock positioning pointers (6) are arranged on the pair of lock positioning mounting seats (8).

6. The assembly device for the push-pull and flip-over locking device for railway containers according to claim 5, characterized in that: The lock head positioning pointer (6) is threadedly connected to the lock head positioning mounting seat (8); The upper end of the lock positioning pointer (6) is fixedly connected to a hand wheel (61); The lock positioning pointer (6) is provided with a first scale line.

7. The assembly device for the push-pull and flip-over locking device for railway containers according to claim 1, characterized in that: The lock seat positioning component (3) is a groove-shaped component that matches the shape of the lock seat.

8. The assembly device for the push-pull and flip-over locking device for railway containers according to claim 1, characterized in that: The tightening assembly (5) comprises: A top-tightening mounting seat (51), wherein the upper portion of the top-tightening mounting seat (51) is fixedly connected to the end of the first rod (41), or the upper portion of the top-tightening mounting seat (51) is fixedly connected to the end of the second rod (42); A tightening bolt (52), wherein the tightening bolt (52) is threadedly connected to the lower portion of the tightening mounting seat (51), and the tightening bolt (52) is provided with a second scale line.

9. The assembly device for the push-pull and flip-over locking device for railway containers according to claim 8, characterized in that: A locking plate (53) is also fixedly provided at the middle upper portion of the tightening mounting seat (51); the first set ear (44) and the second set ear (45) are both provided with a rectangular hole (47) matching the outer peripheral shape of the locking plate (53); and the locking plate (53) is movably inserted into the rectangular hole (47).

10. A method for assembling a push-pull flip-type locking device for a railway container, using the assembly device according to any one of claims 1 to 9, characterized in that: include: Placing the assembly device on the flat car chassis (9); Adjusting the position of the frame (1) until the frame positioning component (2) matches the position of the transverse center line and the longitudinal center line; Synchronously rotating the middle connecting sleeves (43) of a pair of adjusting rods (4) until the four tightening assemblies (5) clamp the side walls of the flat car underframe (9); Placing a plurality of locks with reference to the positions of a plurality of lock positioning pointers (6), and placing a plurality of lock seats with reference to the positions of a plurality of lock seat positioning components (3); The plurality of lock heads and the plurality of lock seats are assembled and fixed to the flat car bottom frame (9).

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